package jmercury;

import java.util.Calendar;
import java.util.logging.Level;
import java.util.logging.Logger;
import jssc.SerialPort;
import jssc.SerialPortException;

public class M233Lib {

    private String portName;
    private SerialPort serialPort;
    private Calendar lastCmdTime;
    private int delay = 500;
    private byte[] lastResp = new byte[0];
    private int[] CRC16_TABLE = {0x0000, 0xc0c1, 0xc181, 0x0140, 0xc301, 0x03c0, 0x0280, 0xc241, 0xc601, 0x06c0, 0x0780, 0xc741, 0x0500, 0xc5c1, 0xc481, 0x0440, 0xcc01, 0x0cc0, 0x0d80, 0xcd41, 0x0f00, 0xcfc1, 0xce81, 0x0e40, 0x0a00, 0xcac1, 0xcb81, 0x0b40, 0xc901, 0x09c0, 0x0880, 0xc841, 0xd801, 0x18c0, 0x1980, 0xd941, 0x1b00, 0xdbc1, 0xda81, 0x1a40, 0x1e00, 0xdec1, 0xdf81, 0x1f40, 0xdd01, 0x1dc0, 0x1c80, 0xdc41, 0x1400, 0xd4c1, 0xd581, 0x1540, 0xd701, 0x17c0, 0x1680, 0xd641, 0xd201, 0x12c0, 0x1380, 0xd341, 0x1100, 0xd1c1, 0xd081, 0x1040, 0xf001, 0x30c0, 0x3180, 0xf141, 0x3300, 0xf3c1, 0xf281, 0x3240, 0x3600, 0xf6c1, 0xf781, 0x3740, 0xf501, 0x35c0, 0x3480, 0xf441, 0x3c00, 0xfcc1, 0xfd81, 0x3d40, 0xff01, 0x3fc0, 0x3e80, 0xfe41, 0xfa01, 0x3ac0, 0x3b80, 0xfb41, 0x3900, 0xf9c1, 0xf881, 0x3840, 0x2800, 0xe8c1, 0xe981, 0x2940, 0xeb01, 0x2bc0, 0x2a80, 0xea41, 0xee01, 0x2ec0, 0x2f80, 0xef41, 0x2d00, 0xedc1, 0xec81, 0x2c40, 0xe401, 0x24c0, 0x2580, 0xe541, 0x2700, 0xe7c1, 0xe681, 0x2640, 0x2200, 0xe2c1, 0xe381, 0x2340, 0xe101, 0x21c0, 0x2080, 0xe041, 0xa001, 0x60c0, 0x6180, 0xa141, 0x6300, 0xa3c1, 0xa281, 0x6240, 0x6600, 0xa6c1, 0xa781, 0x6740, 0xa501, 0x65c0, 0x6480, 0xa441, 0x6c00, 0xacc1, 0xad81, 0x6d40, 0xaf01, 0x6fc0, 0x6e80, 0xae41, 0xaa01, 0x6ac0, 0x6b80, 0xab41, 0x6900, 0xa9c1, 0xa881, 0x6840, 0x7800, 0xb8c1, 0xb981, 0x7940, 0xbb01, 0x7bc0, 0x7a80, 0xba41, 0xbe01, 0x7ec0, 0x7f80, 0xbf41, 0x7d00, 0xbdc1, 0xbc81, 0x7c40, 0xb401, 0x74c0, 0x7580, 0xb541, 0x7700, 0xb7c1, 0xb681, 0x7640, 0x7200, 0xb2c1, 0xb381, 0x7340, 0xb101, 0x71c0, 0x7080, 0xb041, 0x5000, 0x90c1, 0x9181, 0x5140, 0x9301, 0x53c0, 0x5280, 0x9241, 0x9601, 0x56c0, 0x5780, 0x9741, 0x5500, 0x95c1, 0x9481, 0x5440, 0x9c01, 0x5cc0, 0x5d80, 0x9d41, 0x5f00, 0x9fc1, 0x9e81, 0x5e40, 0x5a00, 0x9ac1, 0x9b81, 0x5b40, 0x9901, 0x59c0, 0x5880, 0x9841, 0x8801, 0x48c0, 0x4980, 0x8941, 0x4b00, 0x8bc1, 0x8a81, 0x4a40, 0x4e00, 0x8ec1, 0x8f81, 0x4f40, 0x8d01, 0x4dc0, 0x4c80, 0x8c41, 0x4400, 0x84c1, 0x8581, 0x4540, 0x8701, 0x47c0, 0x4680, 0x8641, 0x8201, 0x42c0, 0x4380, 0x8341, 0x4100, 0x81c1, 0x8081, 0x4040};

    public M233Lib(String portName) {
        this.portName = portName;
        if (!portName.equals("null")) {
            serialPort = new SerialPort(portName);
            lastCmdTime = Calendar.getInstance();
            lastCmdTime.add(Calendar.HOUR_OF_DAY, -1);
        }
    }

    String getComPort() {
        return portName;
    }

    private void setCRC16(byte[] cmd) {
        int sum = 0xFFFF;
        for (int i = 0; i < cmd.length - 2; i++) {
            sum = (sum >> 8) ^ CRC16_TABLE[((sum) ^ ((int) cmd[i] & 0xff)) & 0xff];
        }
        cmd[cmd.length - 1] = (byte) (sum >>> 8);
        cmd[cmd.length - 2] = (byte) sum;
    }

    public void setDelay(int delay) {
        this.delay = delay;
    }

    public int getDelay() {
        return this.delay;
    }

    public boolean sendCMD(byte[] cmd) {
        if (portName.equals("null")) {
            lastResp = new byte[]{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0};
            try {
                Thread.sleep(delay);
            } catch (InterruptedException ex) {
                Logger.getLogger(M233Lib.class.getName()).log(Level.SEVERE, null, ex);
            }
            return false;
        }
        Calendar ca = Calendar.getInstance();
        ca.add(Calendar.SECOND, -200);
        if (lastCmdTime.before(ca)) {
            byte[] tcmd = new byte[]{
                cmd[0], // Адрес
                (byte) 0x01, // Код запроса
                (byte) 0x01, // Access level
                (byte) 0x01, // Password
                (byte) 0x01, // Password
                (byte) 0x01, // Password
                (byte) 0x01, // Password
                (byte) 0x01, // Password
                (byte) 0x01, // Password
                (byte) 0x00, // CRC
                (byte) 0x00};// CRC
            setCRC16(tcmd);
            try {
                if (!serialPort.isOpened()) {
                    if (!serialPort.openPort()) {
                        return false;
                    }
                    serialPort.setParams(jssc.SerialPort.BAUDRATE_9600, jssc.SerialPort.DATABITS_8, jssc.SerialPort.STOPBITS_1, jssc.SerialPort.PARITY_NONE);
                    if (!serialPort.isOpened()) {
                        return false;
                    }
                }
                serialPort.writeBytes(tcmd);
                Thread.sleep(delay);
                serialPort.readBytes();
            } catch (SerialPortException | InterruptedException ex) {
                Logger.getLogger(M233Lib.class.getName()).log(Level.SEVERE, null, ex);
                return false;
            }
        }
        setCRC16(cmd);
        try {
            if (!serialPort.isOpened()) {
                serialPort.openPort();
                if (!serialPort.isOpened()) {
                    return false;
                }
            }
            serialPort.writeBytes(cmd);
            Thread.sleep(delay);
            lastResp = serialPort.readBytes();
            serialPort.closePort();
        } catch (SerialPortException | InterruptedException ex) {
            Logger.getLogger(M233Lib.class.getName()).log(Level.SEVERE, null, ex);
            return false;
        }
        lastCmdTime = Calendar.getInstance();
        return true;
    }

    public byte[] getResponse() {
        if (lastResp == null) {
            return null;
        }
        byte[] resp = lastResp.clone();
        lastResp = new byte[0];
        return resp;
    }
}
